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公开(公告)号：JP2000069052A
公开(公告)日：2000-03-03
申请号：JP3243799
申请日：1999-02-10
Applicant: IBM
Inventor： BLANC ALAIN , BREZZO BERNARD , DEBORD PIERRE , WIDMER ALBERT
IPC: H04J3/00 , H04L12/54 , H04L12/70 , H04L12/801 , H04L12/825 , H04L12/931 , H04L12/935 , H04L12/937 , H04L25/49 , H04L12/28
Abstract: PROBLEM TO BE SOLVED: To provide a flow control channel for switching architecture usable even at the time of attachment to a port expansion part. SOLUTION: Concerning the flow control method for switching architecture provided with a central switch core having a related distributed switch core access layer to communicate with a core through serial data communication links 40 and 50, the serial links 40 and 50 report coded data flows according to 8B/10B codes and prepare additional dedicated flow control channels while using two of three comma characters. In the idle or vacant state of cells, the kind of the comma character to first appear in the cell provides suitable flow control bit information.
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公开(公告)号：JP2004007848A
公开(公告)日：2004-01-08
申请号：JP2003326558
申请日：2003-09-18
Applicant: IBM
Inventor： BLANC ALAIN , BREZZO BERNARD , DEBORD PIERRE , WIDMER ALBERT
IPC: H04J3/00 , H04L12/54 , H04L12/70 , H04L12/801 , H04L12/825 , H04L12/931 , H04L12/935 , H04L12/937 , H04L25/49 , H04L12/56
Abstract: PROBLEM TO BE SOLVED: To provide a flow control channel for switching architecture usable even when attached to a port expansion part. SOLUTION: The flow control method for switching architecture is provided with a central switch core having a related distributed switch core access layer to communicate with a core through serial data communication links, the serial links report coded data flows according to 8B/10B codes and prepare additional dedicated flow control channels while using two of three comma characters. In the idle or vacant state of cells, the kind of the comma character to first appear in the cell provides suitable flow control bit information. COPYRIGHT: (C)2004,JPO
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公开(公告)号：DE69819129T2
公开(公告)日：2004-07-29
申请号：DE69819129
申请日：1998-10-29
Applicant: IBM
Inventor： BLANC ALAIN , BREZZO BERNARD , DEBORD PIERRE , WIDMER ALBERT
Abstract: A flow control process for a switching architecture having a central switch core with associated distributed Switch Core Access Layers communicating with the core by means of serial data communication links. The serial links carry data flows that are coded in accordance with the 8B/10B coding, where two among the three comma characters are used for creating an additional specialized flow control channel. When the cells are idle or empty, the nature of the comma character that appears at the beginning of the cell provides the appropriate flow control bit information. For instance, should the K.28.5 character be detected, the receiving entity (either the switching structure or a distributed SCAL element) decodes the character as positive flow control information, corresponding to a request to reduce the incoming data flow. Also, should the K.28.1 character be decoded, then the receiving entity decodes this as information according to which no reduction in the data flow is requested. When the incoming flow provides data cells, the invention uses a predetermined bit within the data cell, generally that immediately following the beginning of the cell, in order to carry the flow control information.
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公开(公告)号：DE69819129D1
公开(公告)日：2003-11-27
申请号：DE69819129
申请日：1998-10-29
Applicant: IBM
Inventor： BLANC ALAIN , BREZZO BERNARD , DEBORD PIERRE , WIDMER ALBERT
Abstract: A flow control process for a switching architecture having a central switch core with associated distributed Switch Core Access Layers communicating with the core by means of serial data communication links. The serial links carry data flows that are coded in accordance with the 8B/10B coding, where two among the three comma characters are used for creating an additional specialized flow control channel. When the cells are idle or empty, the nature of the comma character that appears at the beginning of the cell provides the appropriate flow control bit information. For instance, should the K.28.5 character be detected, the receiving entity (either the switching structure or a distributed SCAL element) decodes the character as positive flow control information, corresponding to a request to reduce the incoming data flow. Also, should the K.28.1 character be decoded, then the receiving entity decodes this as information according to which no reduction in the data flow is requested. When the incoming flow provides data cells, the invention uses a predetermined bit within the data cell, generally that immediately following the beginning of the cell, in order to carry the flow control information.
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